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Implantation of Total Artificial Heart in Congenital Heart Disease
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Driver electronics design and control for a total artificial heart linear motor.

Kristin Unthan1, Elena Cuenca-Navalon2, Benedikt Pelletier2

  • 1Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH-Aachen University, Pauwelsstraße 20, 52074, Aachen, Germany. kristinunthan@web.de.

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Summary

This study optimized driver electronics and control for a Total Artificial Heart

Keywords:
Artificial heartArtificial implantBiomedical engineering

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Implantable Devices

Background:

  • Device size and efficiency are critical for implantable devices.
  • Total Artificial Heart (TAH) systems require optimized motor performance.
  • Existing TAH designs face challenges in size and power efficiency.

Purpose of the Study:

  • To optimize driver electronics and control strategies for a linear motor in a Total Artificial Heart.
  • To enhance the size and efficiency of implantable devices.
  • To evaluate power electronics control methods for improved motor force generation.

Main Methods:

  • Compared unipolar and bipolar switching for power electronics control, analyzing current ripple and power losses.
  • Utilized a force test rig to measure effective magnetic flux for Lorentz force distribution.
  • Conducted static and dynamic measurements under physiological conditions to assess system performance.

Main Results:

  • Unipolar switching demonstrated reduced current ripple and lower power requirements compared to bipolar switching.
  • Optimized Lorentz force distribution minimized power losses.
  • Achieved overall efficiencies exceeding 89% under physiological conditions.

Conclusions:

  • The developed driver electronics and control strategy optimize size and efficiency for implantable devices.
  • The optimized system effectively generates required motor force under physiological conditions.
  • This approach is suitable for various implantable or portable devices with multiple motor coils.